Shock absorber



June 9, 1925.l

.i. P. BALDWIN SHOCK ABSORBER Filed Nav. 11, 1924 Patented 2 June NTED- Sims JAMES PIERCE BALDWIN, or nos'niidn'niis 4enLiroiiiiia if Application` filed `,Novernber l @Ilm-.$749,272. l .l 11

following is a specification.V

This invention relatesfto4 running friction Vclutches adapted for luse as. spring dampersi-on automobiles andfrelates more particularly to that type of damper which uses moving struts'for actuating the. frict1on `mechanism. 'ffIt l is distinguished from suchfrunning clutches as are designedfor lsubstantially unyielding 'engagement7 andiinN order to more clearly Ldefine its character, I liavef terined it a lslidingclutch` -Itlis entirelyiforeign to stationary lclutches which` are clutches'thatl function equally finrboth directions of movement.'y

Heretofore, when running clutches, that is, clutches functioning in but one .direc tion of movement,` and substantially tunf yielding in this onefd'irectio'n, vhavebeen used as spring dampers, it has beenfnecessary toprovide delicate adjustmentslorto fitsuch clutches with resilient members, so that the` clutch will offer the; desired yielding resistance, and an object of" this inveiition is to provide a ruiming friction clutch that will'offer the desired yielding resist! ance to movement of the spring, without the use of such resilient members and without delicate adjustments. This application constitutes a continuation in part of my application Serial No. 246,408, led June 22, 1918. H

`In the accompanying drawings one form of .the invention is illustrated by way of example, but it will be understood that the invention is susceptible of considerable modification without departing from its spirit and scope. l

In the drawings: v

Figures l and 2 illustrate together one method of attaching my improved clutch to an automobile spring so as to dampen its oscillations, the form of clutch disclosed having an oscillatable annular ring secured to one member and a stationary support for the struts and brake shoesto the other member.

Figure 3y is a partial section on a large scale through the clutch, showing one of the brake shoes, and the moving strut.

. adjustingscrew-V Clutch.

Figu

re, 5 is a vertical :section through 4the vclutch onfthe lines 5f5 ofgFigure 4.

d agua; ist tettaaragiiiataafe The. `@sensatie aegis maimed '5610, i,

this ring `havi ngy an arm Vll connected 4 by a link12V with a bracket,13 ,-cl-amp'edqtothe Vcross-piece or axle 14VV of the automobile.4

The ring is provided. with Va Vcylindricalinternal-friction4 faceY 151 against which bear l the spacedf rub faces or friction pads .'16 of three brakejshoes; 17,- i Thesefbrakeshgoes are' noii-res'ilieii-t:y and are; Vprovided T with slight recesses. l8mwithin, whichr the cylindrical4 outer ends of z struts f 19 received,

l The inner ends of these; struts are likewise provided; with, cylindrical faces l Y whichiiest Y in .con respondinglyr shaped i re-` V cesses in bearing blocks- 20. Bearing Ablocks or supportingmember 211` which, ,may be adjusted invirardly and outwardly by` the 22,.,as pointed outf-in;4 my copending application, to radially,- adjust the bea-ring blocksand struts.

may extending lugs' .24 apaitfthe lugs @f @M11-@Pa formngrto.: gether agretaining groove fora Vstrut, 19. Springs 2G bearagainst thel brake shoes and struts at the joints between these members and tend to tliriist^the brake shoes into Contact with the oscillatable ring l0.

As the ring -10 moves in the direction of the arrow (Figure 3), the brake shoefwill follow and be thrust by the struts toward its friction surface to retard the movement ofthe ring.`

release the ring.v

The angle HAO indicates the angle of thrust when the strut 19 is in fully'engaged position. It will'be seen-that it is thus possible` to predetermine the angle of thrust at theposition where the` strut is exerting its maximum pressure, and with astyle of strut which is not new in the art.v This result is accomplished by arrangingthe guide walls or ways24 and 25 at one side of and parallel to the radial line'` OS and'by `thus p-roviding a fixed stop at 24 for preventing the strut from assuming a position in which the angle of thrust would approximate the angle of Zero, which would occur shouldthe strut become radial to the annulus or ring. In order toinsure functioning of the strut Movement of the ring in the opposite direction causes the brake shoe to vol Y, .i L'lh Stationary `base plate; 23. isA provided with `pairs ofi up:

' aHd-.Qpaced 75l j in turn rest `ra, ;a inst the triangular base all "times, that is, to insure that when the i ring 10 moves in the directionlofftlie arrow the brake shoes will `movefrom disengaged' to engaged position, springs 26 are". provided. These may be dispensed with if there is constant engagement between the brake shoes and ring l() and a sufliciently. high co-e.

efficient of friction to secure movement of the brake shoe into engaging position. While the shoe is approaching fully engaged position, `lthe, angle of thrust 'is becoming smaller, but can never become less than the angle -HAO because ofthe stop 24.5

The style of clutch, as lwell asthe design of its componentvparts, the shoe friction member and strut may be varied largely without departing from the spiritof the invention.

' I Having thus described my invention what I claim as new and desire to lsecure by U. S. Letters Patent is;

1.1 In a shoclrabsorber, in combination,

y relatively movable but non-'separable fricl tion andrsupporting members,'and a brake shoeand movablestrut interposed between said members, one end ofthe s'trutkbeing carried by Vthe support and the other end en gaging the brake shoe, 'the arrangement being such that the strut vtends to 'assume such position- Vas totransmit thrust'in la direction normal to the friction member -as 'it 'moves in one direction, and means for preventing said str-'ut'from assuming suoli positiomfor theA purpose set forth'.

-2.In'a shock absorberpin combination, relatively movable but non-'separable friction and-supporting members, and a brake shoe and vmovable strut interposed between said members, one end ofthe strut .being carried by the support and other end engaging the brake shoe, the arrangement being such that the strut tends to assume such position as'toV transmit thrust in a direction normal to the friction member as it moves in one direction, and a stop or abutment in the path of the'moving strut to limit its movement so as to prevent it from transmitting thrust in adi'rection normal to the friction member. 3.In a shoclrabsorber, in combination, an annulus provided with an internal friction face,l a support disposed centrally thereof, a brakeslioeadapted to engage the friction face, a` in'ovable'strut for conveying the thrust of the shoe to said support, said strut being moved toward a position to convey the thrust radially to the support as the shoe increases its resistance to the movement of l the annulus, and means to prevent the strut assuming a position to convey radial thrust, for theipurpose set forth.

4. In a shock absorber, incombination, an annulus provided ywith an internal friction face, a supportdisposed centrallythereof, I

- JAMES PIERCE BALDWIN. 

